Can't define variables in function

[bredelings]

It looks like if you define variables in a function, then they can't be referenced outside the function. This makes code like the following not work:

function Integer[] cumsum(Integer[] xs) {
         acc = 0
         for (ix in 1:3) {
             acc = acc + xs[ix]
             ys[ix] = acc
         }
         return ys
}

While it would be ideal if such things would work, it might be OK to just document what you can and cannot expect from functions.

[bredelings]

Example:

function Integer[] cumsum(Integer[] xs) {
         acc = 0
         for (ix in 1:3) {
             acc = acc + xs[ix]
             ys[ix] = acc
         }
         return ys
}

for (ix in 1:3) {
    z1[ix] = rpois(1, 1)
    z2[ix] = ix
    z3[ix] = 0
}

print(z1)
print(z2)
print(z3)

x = [1,2,3]

acc = 0
for (ix in 1:3) {
    acc = acc + x[ix]
    y1[ix] = acc
}
print(y1)

y2 = cumsum(x)
print(y2)

Output looks like:

> source("rb-command.Rev")
   Processing file "rb-command.Rev"
1,2,0
1,2,3
0,0,0
1,3,6
   Missing Variable:	Variable ys[1] does not exist
   Error:	Problem processing line 29 in file "rb-command.Rev"
> 

[wrightaprilm]

This is sort of odd, because I get the same error if I save rb-command.Rev in a regular text editor and try running it with the eb executable at the cmd line. But if I run cell-by-cell in a Jupyter notebook, I get the expected output. But then if I run it line-by-line in the revbayes exectuteable, I still get the Variable ys[1] does not exist. I'm not sure what's going on here.